1915.] 



SCAPAl^-US LATIMANUS SEEICATUS. 



71 



SOAPANUS LATIMANUS SERICATUS Jackson. 



YosEMiTE Mole. 



(PL IV, fig. 7; PI. VI, fig. 16.) 



Scapanm latimanus sericatus Jackson, Proc. Biol. Soc. Washington, voL 27, p. 55, 

 March 20, 1914. 



Type locality. — Yosemite, Yosemite Valley, Mariposa County, Cali- 

 fornia. 



Type specimen. — No. 109548, U. S. Nat. Mus., Biological Survey 

 collection; ? adult, skin and skull; collected August 20, 1901, by 

 W. K. Fisher. 



Geographic range. — Yosemite region, Mariposa County, Cal. 



General characters. — Smaller than S. I. latimanus, darker and more 

 grayish in fresh pelage; larger and darker than S, I. occultus or S. I. 

 minusculus; claws, especially of fore feet, longer and more slender 

 than those of latimanus; skull relatively long, narrow, and flat. 



Color. — Fresh summer pelage: Upperparts fuscous-black; under- 

 parts more grayish, dark mouse gray. Worn summer pelage: Upper- 

 parts glossy olive-brown, underparts slightly paler. 



STcuU. — Relatively long, narrow, especially through mastoids; 

 smaller than that of 8. I. latimanus; larger than that of S. I. occultus^ 

 8. I. minusculus, or 8. I. grinnelli; about equal in length to that of 

 8. I. dilatus, but much narrower, and not so high through the brain- 

 case. 



Measurements. — Two adult females, type and virtual topotype: 

 Total length, 165, 171; tail vertebra, 36, 34; hind foot, 21, 22. 8]cull: 

 Skulls of two adult females, type and virtual topotype: Greatest 

 length, 34.3, 34; palatilar length, 13.3, 13.7; mastoidal breadth, 

 16.2, 15.9; interorbital breadth, 7.2, 7.5; maxillary tooth row, 11, 

 10.8; mandibular molar-premolar row, 10.4, 10.4. 



RemarJcs. — The skuUs of the type and topotype ^ of sericatus sh6w 

 minor differences, but in essential features they are remarkably alike. 

 They are very unlike the skull of 8. I. minusculus, being distinctly 

 larger, and with different proportions. The subspecies sericatus is 

 intermediate in size between 8. I. latimanus and 8. I. occultus, and in 

 fresh pelage is darker than either. The type of sericatus is mostly in 

 worn summer pelage, fresh pelage appearing on the abdomen and 

 flanks ; the topotype is in fresh summer pelage. An adult male from 

 Bower Cave, Mariposa County, is not typical of the subspecies; it 

 has a shorter tail than specimens from the Yosemite Valley, and 

 the skull is flatter and wider through the braincase than that of typical 

 sericatus. 



8pecimens examined. — Total number, 3, as follows: 

 California: Bower Cave, 1; Yosemite (type locality), 1; Yosemite Valley, 1.^ 



1 No. 12980, Mus. Vert. ZooL, Univ. California. 2 Collection Mus. Vert. ZooL, Univ. California. 



